Yukiko Tatsumiya is the daughter of Yukari Tatsumiya and inherits her mother’s powerful spiritual abilities. In Doomed Megalopolis, her psychic nature makes her a target for Yasunori Katou, who kidnaps her in order to use her as a sacrifice and amplify the destructive power beneath Tokyo. Although Yukiko is not the central fighter of the story, her existence is crucial to Katou’s plan and to the supernatural conflict surrounding the fate of the city.